Circular No. 7724

Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/iau/cbat.html Phone 617-495-7244/7440/7444 (for emergency use only)

SUPERNOVA 2001en IN NGC 523

D. Hutchings and W. D. Li, University of California at Berkeley, report the discovery by LOTOSS (cf. IAUC 7514) of an apparent supernova in unfiltered images taken with the Katzman Automatic Imaging Telescope (KAIT) on Sept. 26.5 (mag about 17.5) and 27.3 UT (mag about 17.0). SN 2001en is located at R.A. = 1h25m22s.90, Decl. = +34o01'30".5 (equinox 2000.0), which is 6".4 east and 2".8 south of the eastern nucleus of NGC 523. An unfiltered KAIT image taken on Sept. 20.4 showed nothing at this positon (limiting mag about 19.5).

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Host galaxy info: Vel = 4758 km/s, 2.5' x 0.7', 13.5, Pec

SN type info: Ia

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